The BitFenix Spectre Fan is engineered for both silent operation and
maximum airflow. The spectre will keep your entire system well
ventilated without making it sound like an airplane hangar. Spectre Fans
are designed with sickle fan blades, which enhance airflow without
producing excess noise. Fluid dynamic bearings reduce friction for long
life and quiet operation, while an attractive matte finish gives your
entire system a look that's second to none.